Here's what rhymes with colliform.
form farm harm forme reform warm charm inform storm norm swarm disarm dorm rewarm perform alarm forearm chloroform deform firearm preform rearm overarm uniform conform lukewarm fusiform nonfarm cruciform multiform underarm yardarm transform outperform vermiform schoolmarm misinform cuneiform thunderstorm nonuniform Words that almost rhyme with colliform
horn psalm thorn shorn born corn borne torn worn barn warn scorn sworn yarn morn mourn darn porn tarn lorn adorn forlorn reborn careworn forborne lowborn unborn outworn unicorn forewarn forsworn lovelorn unworn foresworn firstborn stillborn waterborne timeworn sweetcorn peppercorn homme vom som com calm bomb palm mom bom balm nom rom tom dom mam suam pom iamb quam prom embalm qualm salaam becalm aplomb cardamom consomme firebomb intercom pogrom supermom